Johnny Deep showed his appreciation for his Kids' Choice Award with a sliming.

After winning the blimp-shaped favourite movie actor trophy for his role as the Mad Hatter in Alice in Wonderland, Depp picked up a hose and unleashed waves of green gloop on the screaming crowd.

Nickelodeon's 24th annual shenanigan-packed ceremony was being held at University of Southern California's Galen Centre.

"You guys are the future," Depp said before spraying the slime.

The screaming mob at Nickelodeon's 24th annual fan-favourite ceremony later revolted by flicking the goo at Modern Family co-star Rico Rodriguez and Arthur leading man Russell Brand as they presented Eddie Murphy with the award for favourite voice from an animated movie for his role in Shrek Forever After.

Jack Black, the zany master of ceremonies, kicked off the silly show by arriving in a monster truck, performing a flash mob-style routine on the orange carpet, then dancing alongside the Black Eyed Peas, who crooned a medley of their tunes while sporting outfits made of colourful blocks.

Other winners included The Karate Kid for movie, Despicable Me for animated movie, iCarly for TV show, Wizards of Waverly Place star Selena Gomez for TV actress, The Suite Life on Deck co-star Dylan Sprouse for TV actor, iCarly co-star Jennette McCurdy for TV sidekick and Just Dance 2 for video game.

In the music categories, the winners of blimp-shaped trophies were the Black Eyed Peas for music group, Katy Perry for female singer and Justin Bieber for male singer and song for Baby.

Several celebrities received their own sliming. Heidi Klum was blasted with gloop from an envelope. Jane Lynch delivered a slime slushie to Jason Segel, while Snoop Dogg was doused after performing with boy band Big Time Rush.